Rename KernelWorldBuilder to KernelElementBuilder

pkg/compiler/lib/src/ssa/builder_kernel.dart

Index: pkg/compiler/lib/src/ssa/builder_kernel.dart
diff --git a/pkg/compiler/lib/src/ssa/builder_kernel.dart b/pkg/compiler/lib/src/ssa/builder_kernel.dart
index b65035ed517fc475d157a342d544ad4a3c6b0436..9d1d2bf0699bb4bac62fbfe4174bef5dfd141cbc 100644
--- a/pkg/compiler/lib/src/ssa/builder_kernel.dart
+++ b/pkg/compiler/lib/src/ssa/builder_kernel.dart
@@ -2496,7 +2496,8 @@ class KernelSsaBuilder extends ir.Visitor with GraphBuilder {
     push(new HForeignCode(nativeBehavior.codeTemplate, ssaType, inputs,
         isStatement: !nativeBehavior.codeTemplate.isExpression,
         effects: nativeBehavior.sideEffects,
-        nativeBehavior: nativeBehavior)..sourceInformation = sourceInformation);
+        nativeBehavior: nativeBehavior)
+      ..sourceInformation = sourceInformation);
   }
 
   void handleJsStringConcat(ir.StaticInvocation invocation) {
@@ -2600,9 +2601,8 @@ class KernelSsaBuilder extends ir.Visitor with GraphBuilder {
     _pushDynamicInvocation(
         invocation,
         astAdapter.typeOfInvocation(invocation, closedWorld),
-        <HInstruction>[receiver]
-          ..addAll(
-              _visitArgumentsForDynamicTarget(selector, invocation.arguments)));
+        <HInstruction>[receiver]..addAll(
+            _visitArgumentsForDynamicTarget(selector, invocation.arguments)));
   }
 
   bool _handleEqualsNull(ir.MethodInvocation invocation) {